Carburetor



W. A HEIDE.

CARBURETOR.

APPLICATION FILED SEPT 28,1918.

Patented. m. 17,1922;

2 SHEETS-SHEET I.

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WILLIAM A. HEKDE, 0F DETRQIT, MIGHIG-AN.

CARBURETOR.

Application filed September 25, 1918.

To all whom it may concern:

Be it known that I, W LLIAM A. Huron, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Carburetor, of which the following is a specification.

The subject of the present invention is a carburetor intended, primarily, for use with an automobile motor, though capable of use with any internal combustion engine.

One of the objects of the invention is to provide a valve within an air intake tube of the carburetor and which is operatively connected to the throttle so that the tube will operate simultaneously, the said valve having means for automatically opening the valve in the event of back firing and, at the same time, closing communication with the fuel intake port opening from the vacuum cup of the carburetor to'the air intake tube.

Another object is to combine with the carburetor an improved means whereby a jet of priming fuel can be directed into the air intake tube close to the throttle.

A further object is to provide a fuel con trolling valve having a novel means for holding it against accidental movement and for taking up wear thereon.

It is also within the contemplation of the invention to generally improve the construc tion and enhance the utility of carburetors.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without de' parting from the spirit of the invention.

Practical embodiments of the invention are shown in the accompanying drawings,

- wherein Figure 1 is a plan view of a carburetor constructed in accordance with the invention, a portion being in section;

Figure 2 is a side elevation of the same;

Figure 3 is a sectional view taken on the line 3-3 of Figure 1; t

Figure 4 is a sectional view taken on the line i4 of Figure 1;

Figure 5 is a detail sectional view taken on the line 55 of Figure t;

Serial No. 256,087.

shape and closed by a lid or cover 11, which ca may be secured on the float chamber in any desired manner. Secured to the lid or cover 11, and depending therefrom within the float chamber 10, is a hinged bracket or hanger 12, to one leaf of which is secured a float 13 which is adapted to rise and fall with the rise and fall of the liquid in the float chamber 10. The leaf of the hinged hanger 12 to which the float 13 is secured is formed with spaced cars 14 between which 755 the stem of a valve 15 is pivotally secured. The valve 15 is adapted to enter a counter bore formed in the bottom face of the cover 11 and seat against the counterbore in the block 16 formed as an upward extension so thereof and close the inlet port or duct 17 to control the supply of liquid in the float chamber the port 17 being in communication with a fuel pipe 18.

The block 16 is also cored or drilled to provide an enlarged bore or vacuum cup 19, the contracted end of which is in communication with and extends at right angles to a supply pipe or outlet tube 20 which depends within the float chamber and terminates near the bottom thereof, passing through a slot 13 formed in the float 13.

An air duct 19" forms a continuation of the reduced end of the vacuum cup 19 and places the same in communication with the atmosphere so that air may be drawn across the discharge endof the outlet tube 20 to inject air and gasoline into the cup 19. The cup 19 alines with an aperture 19', which aperture forms a portion of the cup, formed in we a lining tube 23, which is secured by screws 24 or otherwise within the air intake tube 25, The bore of the lining tube 23- is preferably rectangular in cross section, as shown.

A needle valve 21 is threaded into the block 16 and seats upon the discharge end of the pipe or tube 20 for the purpose of controlling the supply of gasohne drawn from the float chamber to the air intake 11% tube 95. A bar or strip 22 may be secured by screws or otherwise to the block 16 and the float chamber.

forms a portion of the threaded socket through which the needle valve is inserted. This strip 22 maybe drawn by the screws more firmly against the threaded stem of the needle valve for the purpose of providing a proper binding effect upon the stem and holding the valve firmly in any position to which set. understood, compensate for wear.

Pivotally mounted within the lining tube 23 of the air intake pipe 25, upon a pin 26,

is a flap valve 27, the outer end of which is positioned within an opening or slot 25' formed in the lining tube 23 and the air intake pipe 25. A lug 28 is secured-to the outer end of the flap-valve 27 and projects through the slot 25'. The inner end of the valve 27 is formed with an aperture or slot 28 which is normally closed by a tongue 29, of resilient material. which forms a valve adapted to give should back fire take place so as to prevent ignition of the gasoline in The inner end of the valve 27 is adapted 'to overlie the aperture 19' with its extreme inner end positioned be:

tween the aperture and the discharge. end of the air intake pipe 25.

A connecting rod 30 has one end pivotally' secured to the lug 28, while its other end is pivotally secured to the short arm of a bell crank lever' 31, which lever is secured to the extending end of the stem of the butterfly throttle valve 32.

From the foregoing it will be seen that the throttle valve may be operated by swinging the bell crank lever 31, and that, as the throttle opens, the valve 27 will open so that, when the throttle is fully opened, the valve 27 will also be fully opened. In closing the throttle, an opposite movement of the valve 27 is had. This will insure a reduction of the air passage adjacent the vacuum cup 19 and 19' when the throttle is partly closed and rovide a proper suction at this point at al times.

In order that the device may be properly attached to'the intake manifold of a nc-- ed to register with the port 34 when the plug is turned to one position,-but normally held out of register with the said port 34. The plug 37 is also provided with a port 39 K which is normally held in register with the port 36 to place the interior of the plug in communication with the atmosphere. The plug is held in normal position by means of It will also. as will be readilya torsion spring 40 which surrounds the upper end of the valve casing and which has one end anchored against the casing while the other end contacts 'a cross head or arm 41 whichis carried by the extending end of the plug. The rotary movement of the plug 37 is limited by a lug '42 which rises from the upper end of the valve casing 35 and contacts the cross head 41, or by other suitable means.

The plug 37 may be turned for the purpose of priming the motor by means of a member 42' which is connected to one arm of the cross head, and which may extend ltghler'efrom to any desired part of the automo- The inlet port 34, while herein shown as situated to the outside of the butterfly valve 32, may be placed in that portion of the air intake pipe which lies inside of the butterfly valve, or it may be so placed that the edge of the butterflyvalve 32 will cover the port when the valve is closed.

In order that the plug 37 may permit communication with a supply of fuel for priming purposes, a tube or pipe 43 is threaded into the lower-end of the valve casing 35 through the cover 11 and-depends within the float chamber 10, terminating near the bottom thereof, the plug 37' being turned for this purpose to bring the port 38 into communication with the port 34, while the port 39 is out of re istry with res ect to the port 36, thus permitting the liquld fuel to be drawn from the float chamber by suction directly into the mixin' chamber and. cylinder. When the'port 38 1s 'moved'out of alinement or registry with respect to the port 34, and the port 39 is alined in the port 36, this places the float chamber in communication with the atmosphere directly, thereby permitting air to be drawn into the float chamber to effect the mixture with the fuel,-

before discharging therefrom. If necessary, a slot may be provided in the float 13 to permit the. passage therethrough of the pipe 43. 1

From the foregoing, and the drawings, it will be seen that the float 13 is of large extent, and that the valve is so placed thereon that the supply of fuel to the chamber 10 is positively and accurately controlled'according to different running conditions and that the valve 15 isseated closely against the inlet port when the chamber has been filled to the desired extent.

Attention is also called to the fact that the fuel is sprayed'or broken up by the air drawn'through the duct 19" and is'thor- .oughly mixed with this air in the vacuum cup 19, and this mixture is again .diluted with the air. when drawn into the intake pipe 25 and is thoroughly mixed with the air in the said pipe or tube. 7

From the foregoing the operation will, it

iso

is thought to be thoroughly understood without a special and extended explanation thereof, it being only necessary to call attention to the fact thatthe duct 19" may be closed during the operation of the motor by inserting therein a stopper or plug 53 for that purpose. When this is done, the fuel is not mixed with air until it reaches the air intake pipe since the supply of air directly to the cup 19 is cut ofi'.

In the modified form of valve shown in Figure 7, for use in lieu of the valve 15 a stem 50 is provided which is threaded to receive a nut 51 for the purpose of securing the stem'in place, and to that end of the stem remote from the threaded end is secured by soldering or otherwise a steel ball 52 which forms the valve.

Having thus described the invention, what is claimed as new and sought by Letters Patent is Pi carburetor including an air intake tube,

being adapted to open the opening in the pivoted valve during a back fire and to close communication between the vacuum cup and the air intake tube.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

WILLIAM A. HEIDE.

Witnesses:

M; G. CRoNeEm. Mrs. E. CRONGEYER. 

